Questions in mathematics

Questions in mathematics

📝 Answered - Find the derivative of [tex]R = \left(100 + \frac{50}{\ln x}\right)[/tex].

📝 Answered - There are 16 girls and 20 boys in the school band. What is the ratio in the simplest form of girls to boys?

📝 Answered - Jerome bought 8 packs of baseball cards at a garage sale. Each pack had 10 cards. He gave his younger sister 3 cards from each pack. How many cards does Jerome have left?

📝 Answered - A welder needs a piece of half-inch pipe 18 3/4 inches long. She has a piece that is 28 1/8 inches long. How much must she cut off from the longer piece?

📝 Answered - Chin bought 12 pounds of apples for $6. At this rate, how much will it cost to buy 3 pounds of apples?

📝 Answered - 70 pennies decreased by 20% is ___.

📝 Answered - During the summer, you want to earn at least $150 per week. You can earn $10 per hour working for a farmer and $5 per hour babysitting. You can work at most 25 hours per week. 1. Write a system of linear inequalities that models the situation. 2. Solve your system, and determine how many hours per week you would work babysitting. 3. If you work 10 hours per week on the farm and 12 hours per week babysitting, will you meet your goal?

📝 Answered - Tickets for a school play cost $4 for adults and $2 for students. At the end of the play, the school sold 105 tickets and collected $360. 1. Write a linear system that models the situation. 2. Find the number of adult and student tickets sold.

📝 Answered - I am a number between 24 and 34. You say my name when you count by twos from zero. You also say my name when you count by fives from zero. What number am I?

📝 Answered - 16 is 30% of what number?